31047139600 has 30 divisors (see below), whose sum is σ = 74590753850. Its totient is φ = 12418855680.

The previous prime is 31047139583. The next prime is 31047139603. The reversal of 31047139600 is 693174013.

It can be written as a sum of positive squares in 3 ways, for example, as 308634624 + 30738504976 = 17568^2 + 175324^2 .

It is not an unprimeable number, because it can be changed into a prime (31047139603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38808525 + ... + 38809324.

Almost surely, 2^31047139600 is an apocalyptic number.

It is an amenable number.

31047139600 is an abundant number, since it is smaller than the sum of its proper divisors (43543614250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31047139600 is a wasteful number, since it uses less digits than its factorization.

31047139600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77617867 (or 77617856 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 31047139600 in words is "thirty-one billion, forty-seven million, one hundred thirty-nine thousand, six hundred".